La Razón frente a la imposición en las estrategias didáctico-propagandísticas del ejército estadounidense durante la Segunda Guerra Mundial: "Why We Fight" de Frank Capra como ejemplo

El presente artículo analiza algunos aspectos de los métodos de formación y propaganda destinados a los sol-dados del ejército estadounidense al enfrentarse a la implicación de su país en la Segunda Guerra Mundial. El general George C. Marshall, jefe del alto mando militar, pretendía oponer a los anticuados métodos de instruc-ción basados en la fuerza del hábito corporal, la fuerza del hábito mental. Esta pretensión supuso desplegar un amplio programa que contemplaba, además de la instrucción militar, la formación intelectual y que contaba, para ello, entre otros recursos, con el cine. En este último ámbito, destac�� la producción de la serie documen-tal de siete episodios “Why We Fight”. La serie, desde su mismo título, pareció apostar por la argumentación racional antes que por la emocional, para hacer comprensible, a los soldados, la implicaciónde Estados Unidos en la contienda mundial. Sin embargo, más allá de su apariencia retórica, la serie debía funcionar como un efectivo mecanismo de propaganda a favor de los intereses estratégicos del país norteamericano

On finite unions and finite products with the D-property

We show that the product of a subparacompact C-scattered space and a Lindelöf D-space is D. In addition, we show that every regular locally D-space which is the union of a finite collection of subparacompact spaces and metacompact spaces has the D-property. Also, we extend this result from the class of locally D-spaces to the wider class of D-scattered spaces. All the results are shown in a direct way.

Pairing in a two-component ultracold Fermi gas: Phases with broken-space symmetries

We explore the phase diagram of a two-component ultracold atomic Fermi gas interacting with zero-range forces in the limit of weak coupling. We focus on the dependence of the pairing gap and the free energy on the variations in the number densities of the two species while the total density of the system is held fixed. As the density asymmetry is increased, the system exhibits a transition from a homogenous Bardeen-Cooper-Schrieffer (BCS) phase to phases with spontaneously broken global space symmetries. One such realization is the deformed Fermi surface superfluidity (DFS) which exploits the possibility of deforming the Fermi surfaces of the species into ellipsoidal form at zero total momentum of Cooper pairs. The critical asymmetries at which the transition from DFS to the unpaired state occurs are larger than those for the BCS phase. In this precritical region the DFS phase lowers the pairing energy of the asymmetric BCS state. We compare quantitatively the DFS phase to another realization of superconducting phases with broken translational symmetry: the single-plane-wave Larkin-Ovchinnikov-Fulde-Ferrell phase, which is characterized by a nonvanishing center-of-mass momentum of the Cooper pairs. The possibility of the detection of the DFS phase in the time-of-flight experiments is discussed and quantified for the case of 6Li atoms trapped in two different hyperfine states.

One- and two-center physical space partitioning of the energy in the density functional theory

A conceptually new approach is introduced for the decomposition of the molecular energy calculated at the density functional theory level of theory into sum of one- and two-atomic energy components, and is realized in the "fuzzy atoms" framework. (Fuzzy atoms mean that the three-dimensional physical space is divided into atomic regions having no sharp boundaries but exhibiting a continuous transition from one to another.) The new scheme uses the new concept of "bond order density" to calculate the diatomic exchange energy components and gives them unexpectedly close to the values calculated by the exact (Hartree-Fock) exchange for the same Kohn-Sham orbitals